CN112994715A - Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device - Google Patents
Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device Download PDFInfo
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- CN112994715A CN112994715A CN202110170108.5A CN202110170108A CN112994715A CN 112994715 A CN112994715 A CN 112994715A CN 202110170108 A CN202110170108 A CN 202110170108A CN 112994715 A CN112994715 A CN 112994715A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The application discloses a method and a device for protecting an ultra-wideband radio frequency link from strong electromagnetic pulse, and relates to the technical field of electromagnetic pulse protection. The radio frequency antenna comprises a metal shell with a metal inner cavity, wherein the metal shell is provided with a radio frequency input end and a radio frequency output end which are communicated with the metal inner cavity; an input radio frequency band wire, a radio frequency coupling module and an output radio frequency band wire which are connected between a radio frequency input end and a radio frequency output end are arranged in the metal inner cavity, and the input radio frequency band wire, the radio frequency coupling module and the output radio frequency band wire form a radio frequency selective network; the application has the advantage of solving the problem of insufficient bandwidth for strong electromagnetic pulse protection of a radio frequency link in China.
Description
Technical Field
The application relates to the field of electromagnetic pulse protection, in particular to a method and a device for protecting a strong electromagnetic pulse of an ultra-wideband radio frequency link.
Background
The antenna and the coaxial feeder line are exposed outside the wireless transceiving system equipment, are very easy to be invaded by various strong transient electromagnetic pulses, and introduce various strong transient electromagnetic pulses into the wireless transceiving system. Therefore, key sensitive equipment in the wireless transceiving system is damaged, and the normal work of wireless equipment and equipment is influenced. Therefore, the radio frequency link strong electromagnetic pulse protection device needs to be installed outside the existing wireless transceiving system equipment for protection.
The strong electromagnetic pulse protection device for the frequency link is required to have good radio frequency characteristic parameters besides the pulse suppression performance. In view of the above related technologies, the inventor believes that the bandwidth of the existing radio frequency link strong electromagnetic pulse protection is generally insufficient, which affects the industry development.
Disclosure of Invention
In order to solve the problem that the bandwidth of the existing radio frequency link strong electromagnetic pulse protection is generally insufficient, the application provides a method and a device for protecting an ultra-wideband radio frequency link strong electromagnetic pulse.
In a first aspect, the present application provides a method for protecting a strong electromagnetic pulse of an ultra-wideband radio frequency link, which adopts the following technical scheme:
a method for protecting a strong electromagnetic pulse of an ultra-wideband radio frequency link comprises the following steps:
arranging a metal shell with a metal inner cavity, wherein the metal shell is provided with a radio frequency input end and a radio frequency output end which are communicated to the metal inner cavity;
an input radio frequency band wire, a radio frequency coupling module and an output radio frequency band wire which are connected between a radio frequency input end and a radio frequency output end are arranged in the metal inner cavity, and the input radio frequency band wire, the radio frequency coupling module and the output radio frequency band wire form a radio frequency selective network;
the input radio frequency strip line and the output radio frequency strip line are parallel to the inner wall of one side of the metal inner cavity; the input radio frequency band line and the output radio frequency band line form a grounding equivalent capacitor of the radio frequency selection network between the input radio frequency band line and the inner wall of the metal inner cavity and a series equivalent inductor of the radio frequency selection network between the input radio frequency band line and the output radio frequency band line.
By adopting the technical scheme, starting from the radio frequency selection network containing a centralized parameter device, the process of manufacturing the distribution parameters of the metal body and both the input radio frequency strip line and the output radio frequency strip line is taken as a breakthrough, the ultra-wideband frequency selection network is constructed by fully utilizing the input radio frequency strip line and the output radio frequency strip line and designing and constructing a series equivalent inductor, a grounding equivalent capacitor and a radio frequency coupling module together with a metal inner cavity, the constructed ultra-wideband frequency selection network has adjustability, the problem of insufficient bandwidth for protecting a radio frequency link strong electromagnetic pulse in China is solved, and a technical short plate restricting the development of the industry is solved.
In a second aspect, the present application provides an ultra-wideband radio frequency link strong electromagnetic pulse protection device, which adopts the following technical scheme:
a kind of ultra wide band radio frequency periodic line strong electromagnetic pulse protector, including metal casing and radio frequency selective network assembly;
a metal inner cavity is formed in the metal shell, and a radio frequency input end and a radio frequency output end which are communicated with the metal inner cavity are arranged on the metal shell;
the radio frequency selection network component is arranged in the metal inner cavity and comprises an input radio frequency strip line, a radio frequency coupling module and an output radio frequency strip line, wherein the input radio frequency strip line, the radio frequency coupling module and the output radio frequency strip line are connected between a radio frequency input end and a radio frequency output end; the input radio frequency strip line and the output radio frequency strip line are parallel to the inner wall of one side of the metal inner cavity;
the input radio frequency band line and the output radio frequency band line form a series equivalent inductance of the radio frequency selection network.
By adopting the technical scheme, the process of manufacturing the distribution parameters of the metal body and both the input radio frequency strip line and the output radio frequency strip line is a breakthrough, the radio frequency circuit board and the metal inner cavity are fully utilized to design the series equivalent inductor, the grounding equivalent capacitor and the radio frequency coupling module to form the ultra wide band frequency selection network, the ultra wide band frequency selection network of the member has adjustability, the problem of insufficient bandwidth for the strong electromagnetic pulse protection of a radio frequency link in China is solved, and the technical short plate for restricting the industry development is solved.
Meanwhile, the basic working frequency band, the bandwidth and the radio frequency performance of the ultra-wideband frequency-selective network formed by the radio frequency-selective network component and the metal shell are mainly determined by the distribution parameters of the input radio frequency band line and the output radio frequency band line in the metal inner cavity and the radio frequency coupling module. The radio frequency characteristic parameters of the ultra-wideband frequency-selecting network are not changed by a device which loads a signal transmission line input to a radio frequency end and a signal transmission line output by the radio frequency end to the ground, and the ultra-wideband frequency-selecting network is very suitable for an open-circuit device which is connected with the ground in parallel and pulled down.
Preferably: the input radio frequency strip line comprises an input radio frequency inductance part arranged in the middle and input radio frequency capacitance parts arranged at two ends; the output radio frequency strip line comprises an output radio frequency inductance part arranged in the middle and output radio frequency capacitance parts arranged at two ends; the grounding equivalent capacitor is composed of an input radio frequency capacitor part and a metal inner cavity inner wall as well as an output radio frequency capacitor part and a metal inner cavity inner wall, and the series equivalent inductor is composed of an input radio frequency inductor part and an output radio frequency inductor part.
By adopting the technical scheme, the input radio frequency strip line and the output radio frequency strip line are separated into the radio frequency capacitance part and the radio frequency inductance part, and the self structural characteristics of the input radio frequency strip line and the output radio frequency strip line and the distribution parameter characteristics of the input radio frequency strip line and the output radio frequency strip line in the metal inner cavity are utilized to the greatest extent.
Preferably: the radio frequency network component also comprises a substrate, wherein the substrate is parallel to the inner wall of one side of the metal inner cavity and divides the metal inner cavity into an upper cavity and a lower cavity; the input radio frequency strip line, the radio frequency coupling module and the output radio frequency strip line are fixed on one side of the substrate, facing the upper cavity.
By adopting the technical scheme, the substrate provides support for the input radio frequency strip line, the radio frequency coupling module and the output radio frequency strip line, so that the input radio frequency strip line, the radio frequency coupling module and the output radio frequency strip line are more stably arranged in the metal inner cavity of the metal shell.
Preferably: the input radio frequency strip line and the output radio frequency strip line are copper foils fixed on the substrate, the input radio frequency strip line and the output radio frequency strip line are arranged on the same straight line, and a distance is arranged between the input radio frequency strip line and the output radio frequency strip line.
By adopting the technical scheme, the input radio frequency strip line and the output radio frequency strip line are arranged on the same straight line, firstly, the copper foil is laid on the substrate, secondly, the close characteristics of the radio frequency strip line and the output radio frequency strip line can be ensured, and the stable ultra wide band frequency selection network is favorably formed.
Preferably: the ultra-wideband radio frequency link strong electromagnetic pulse protection device further comprises a discrete suppression device, the discrete suppression device is arranged in the lower cavity, one end of the discrete suppression device is connected to the substrate, and the other end of the discrete suppression device is connected to the metal shell.
By adopting the technical scheme, a strong transient electromagnetic pulse suppression passage is formed on the frequency selection network through the arrangement of the discrete suppression devices, so that a good suppression effect is achieved.
Preferably: and the input radio frequency band line and/or the output radio frequency band line are/is provided with metal through holes for the electric connection of the discrete suppression devices.
By adopting the technical scheme, the position of the discrete suppression device can be set according to the actual situation so as to achieve the adaptation to various scenes.
Preferably: and a bottom surface copper foil layer is arranged on one side of the substrate surface facing the lower cavity.
By adopting the technical scheme, the arrangement of the bottom surface copper foil layer is more favorable for realizing the electric connection between the discrete restraining device and the substrate.
Preferably: the discrete suppression device is one or more of a gas discharge tube, a transient voltage suppression diode and a semiconductor PIN diode.
By adopting the technical scheme, the gas discharge tube can be used for absorbing and discharging slow-edge strong electromagnetic pulses such as thunder electromagnetic pulses (LEMP), the transient voltage suppression diode can be used for absorbing and discharging slow-edge strong electromagnetic pulses such as thunder electromagnetic pulses (LEMP) and fast-edge strong transient electromagnetic pulses such as nuclear electromagnetic pulses (NEMP), and the semiconductor PIN diode can be used for absorbing and discharging fast-edge strong transient electromagnetic pulses such as nuclear electromagnetic pulses (NEMP) and high-power microwave pulses (HPM).
Preferably: the metal shell comprises a metal body and a metal cover plate, the metal cover plate is detachably connected to the metal body, a waterproof groove is formed in the outer wall of the metal body, facing one side of the metal cover plate, and a waterproof conductive rubber ring is arranged in the waterproof groove.
Through adopting above-mentioned technical scheme, because waterproof conductive rubber ring has elasticity, when the metal cover plate lid connects the opening of metal body, can make waterproof conductive rubber ring produce deformation, seal the space between metal cover plate and the metal body.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) the problem of insufficient bandwidth for protecting a radio frequency link strong electromagnetic pulse in China is solved, and a technical short board which restricts the development of the industry is solved;
(2) the radio frequency characteristic parameters of the formed ultra-wideband frequency-selecting network are not changed by a device which loads a signal transmission line input to a radio frequency end and a signal transmission line output by the radio frequency end to the ground, and the ultra-wideband frequency-selecting network is very suitable for an open-circuit device which is pulled down to the ground;
(3) the circuit is simplified, the cost is saved, and the requirements of engineering application practice are met.
Drawings
FIG. 1 is a schematic diagram of a structure of a strong electromagnetic pulse protection device of an ultra-wideband radio frequency link;
FIG. 2 is a schematic view showing a structure of a metal cavity in a strong electromagnetic pulse protection device for an ultra-wideband radio frequency link;
FIG. 3 is a schematic diagram of an explosion structure of the ultra-wideband radio frequency link strong electromagnetic pulse protection device;
FIG. 4 is a schematic half-section view of a strong electromagnetic pulse protection device for an ultra-wideband radio frequency link;
fig. 5 is an equivalent circuit diagram of the ultra-wideband radio frequency link strong electromagnetic pulse protection device.
Reference numerals: 1. a metal housing; 11. a metal body; 12. a metal cover plate; 13. a metal inner cavity; 14. a radio frequency input; 15. a radio frequency output terminal; 16. a waterproof conductive rubber ring; 2. a radio frequency selective network component; 21. a substrate; 22. inputting a radio frequency strip line; 221. an input radio frequency inductance part; 222. an input radio frequency capacitance part; 23. a radio frequency coupling module; 24. outputting a radio frequency strip line; 241. an output radio frequency inductance part; 242. an output radio frequency capacitance section; 3. a discrete suppression device.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
With the popularization and application of the 5G communication technology and the rapid development of the radio frequency microwave technology to higher frequencies, users of wireless equipment are increasing day by day, various wireless equipment and facilities are widely applied to the engineering application fields of industrial and agricultural production, scientific research, foreign air detection, national defense construction, national and local security defense and the like, and the transceiving systems of various ultra-wideband wireless equipment and facilities are placed in a complex electromagnetic environment.
The antenna and the coaxial feeder line are exposed outside the wireless transceiving system equipment, are very easy to be invaded by various strong transient electromagnetic pulses, and introduce various strong transient electromagnetic pulses into the wireless transceiving system. Therefore, key sensitive equipment in the wireless transceiving system is damaged, and the normal work of wireless equipment and equipment is influenced.
Therefore, the radio frequency link strong electromagnetic pulse protection device needs to be installed outside the existing wireless transceiving system equipment for protection. Therefore, the rf link strong electromagnetic pulse protection device needs to ensure that the useful rf signal can effectively transmit through without any influence on the system function, besides effectively suppressing the strong electromagnetic pulse. Namely, the strong electromagnetic pulse protection device of the radio frequency link not only needs a unique strong electromagnetic pulse protection technology and a radio frequency signal transmission technology, but also needs a proper ultra-wideband frequency-selective network.
The application discloses a method for protecting a strong electromagnetic pulse of an ultra-wideband radio frequency link, as shown in fig. 1 and fig. 2, the method comprises the following steps:
arranging a metal shell 1 with a metal inner cavity 13, wherein the metal shell 1 is provided with a radio frequency input end 14 and a radio frequency output end 15;
an input radio frequency band wire 22, a radio frequency coupling module 23 and an output radio frequency band wire 24 which are connected between a radio frequency input end 14 and a radio frequency output end 15 are arranged in the metal inner cavity 13, and the input radio frequency band wire 22, the radio frequency coupling module 23 and the output radio frequency band wire 24 form a radio frequency selection network;
wherein, the input radio frequency band line 22 and the output radio frequency band line 24 are parallel to the inner wall of one side of the metal inner cavity 13; the input radio frequency band line 22 and the inner wall of the metal inner cavity 13 and the output radio frequency band line 24 and the inner wall of the metal inner cavity 13 form a grounding equivalent capacitor of a radio frequency selection network, and the input radio frequency band line 22 and the output radio frequency band line 24 form a series equivalent inductor of the radio frequency selection network.
Further, a substrate 21 is arranged in the metal cavity 13, and an input radio frequency strip line 22, a radio frequency coupling module 23, an output radio frequency strip line 24, an input radio frequency strip line 22 and an output radio frequency strip line 24 which are connected between the radio frequency input end 14 and the radio frequency output end 15 are arranged on one side end face of the substrate 21, and are copper foils laid on the substrate 21. The substrate 21, the input rf strip line 22 and the output rf strip line 24 constitute an rf circuit board.
The ultra-wideband frequency-selective network is constructed by starting from a radio frequency-selective network containing a centralized parameter device, taking a process of manufacturing distributed parameters of a radio frequency circuit board and a metal body 11 as a breakthrough, fully utilizing a series equivalent inductor, a grounding equivalent capacitor and a radio frequency coupling module 23 designed on the radio frequency circuit board and a metal inner cavity 13, solving the problem of insufficient bandwidth for protecting a radio frequency link strong electromagnetic pulse in China, and solving a technical short board restricting the development of the industry.
In addition, the application also discloses a strong electromagnetic pulse protection device of the ultra-wideband radio frequency link, which comprises a metal shell 1, a radio frequency selection network component 2 and a discrete suppression device 3, as shown in fig. 3 and 4; a metal inner cavity 13 is formed in the metal shell 1, and a radio frequency input end 14 and a radio frequency output end 15 communicated to the inside of the metal inner cavity 13 are arranged on the metal shell 1; the radio frequency selective network component 2 is arranged in the metal inner cavity 13 and is communicated between a radio frequency input end 14 and a radio frequency output end 15. The radio frequency selection network component 2 and the metal shell 1 can form an ultra-wideband resonant frequency selection network. The discrete suppression device 3 is electrically connected between the radio frequency selective network component 2 and the inner wall of the metal inner cavity 13 to form a strong transient electromagnetic pulse suppression passage.
Specifically, as shown in fig. 3 and 4, the metal case 1 is of a hermetically sealed metal structure. The fully-sealed metal structure can improve the electromagnetic shielding performance and the grounding performance of the protection device. The metal shell 1 and the metal inner cavity 13 inside the metal shell are both square on the whole. The metal shell 1 includes a metal body 11 having an opening on one side end surface and a metal cover plate 12 detachably covering the opening of the metal body 11. By detaching the metal cover plate 12 and adjusting parameters in the radio frequency selection network component 2 in the metal inner cavity 13, the bandwidth of the ultra-wideband resonance frequency selection network can be adjusted.
As shown in fig. 3 and 4, the metal body 11 is an integrally formed structure, and an annular waterproof groove is formed on an outer wall of an end surface of the metal body 11 facing the metal cover plate 12. A waterproof conductive rubber ring 16 is arranged in the waterproof groove. Because the waterproof conductive rubber ring 16 has elasticity, when the metal cover plate 12 is covered on the opening of the metal body 11, the waterproof conductive rubber ring 16 can deform, and the gap between the metal cover plate 12 and the metal body 11 is sealed. In the present embodiment, the metal cover plate 12 is detachably and fixedly connected to the metal body 11 by mounting screws on four corners, respectively. Furthermore, the metal body 11 or the metal cover plate 12 may be provided with a grounding screw hole to facilitate grounding of the protection device.
As shown in fig. 3 and 4, 50 ohm signal transmission lines are disposed inside the rf input terminal 14 and the rf output terminal 15, and can be connected to a 50 ohm rf link outside the metal body 11. The rf input end 14 and the rf output end 15 are fixed on two opposite side walls of the metal body 11, so that the signal transmission lines in the rf input end 14 and the rf output end 15 are coaxial. The radio frequency input end 14 and the radio frequency output end 15 and the metal body 11 can be fixed integrally, fixed by a flange plate, fixed by tight-fit compression joint or fixed by threads.
As shown in fig. 3 and 4, the radio frequency selective network component 2 includes a substrate 21, an input radio frequency band line 22, a radio frequency coupling module 23, and an output radio frequency band line 24. The substrate 21 is arranged in the metal inner cavity 13 in parallel with the bottom plate of the metal body 11 to divide the metal inner cavity 13 into an upper cavity and a lower cavity; the input rf strip line 22, the rf coupling module 23 and the output rf strip line 24 are electrically connected between the rf input terminal 14 and the rf output terminal 15, and are fixed on one side of the substrate 21 facing the upper cavity.
As shown in fig. 3 and 4, in the present embodiment, the input rf strip line 22 and the output rf strip line 24 are both copper foils, and are fixed on the substrate 21 by laying, so that the input rf strip line 22 and the output rf strip line 24 are parallel to the metal cover 12. And the input rf strip line 22 and the output rf strip line 24 are disposed on the same straight line, and a small-spaced separation gap is disposed between the input rf strip line 22 and the output rf strip line 24. The input radio frequency band line 22 and the metal cover plate 12, and the output radio frequency band line 24 and the metal cover plate 12 form a grounding equivalent capacitance of the radio frequency selective network, and the input radio frequency band line 22 and the output radio frequency band line 24 form a series equivalent inductance of the radio frequency selective network. The equivalent capacitance value of the radio frequency coupling module 23 is between a picofarad and a few nanofarads, can be determined by a useful working frequency band, and has reconfigurable characteristics. In this embodiment, the rf coupling module 23 employs a coupling capacitor, and in other implementation manners, the rf coupling module 23 may further include a coupling capacitor and a coupling inductor.
As shown in fig. 2 and 5, the input rf strip 22 includes an input rf inductance part 221 disposed in the middle and an input rf capacitance part 222 disposed at both ends, in terms of equivalent principle; the output rf strip 24 includes an output rf inductor 241 disposed in the middle and an output rf capacitor 242 disposed at both ends; the grounding equivalent capacitance is formed by the input radio frequency capacitance part 222 and the inner wall of the metal inner cavity 13, the output radio frequency capacitance part 242 and the inner wall of the metal inner cavity 13, and the series equivalent inductance is formed by the input radio frequency inductance part 221 and the output radio frequency inductance part 241. Therefore, the equivalent circuit of the ultra-wideband frequency selection network comprises a series equivalent inductor L1, a coupling capacitor C1 and a series equivalent inductor L2 which are sequentially connected in series between a radio frequency input end 14 and a radio frequency output end 15, and also comprises four grounding equivalent capacitors C2, C3, C4 and C5 which are connected in parallel between the radio frequency input end 14 and an input series equivalent inductor L1, an input series equivalent inductor L1 and a coupling capacitor C1, a coupling capacitor C1 and a series equivalent inductor L2, and between the series equivalent inductor L2 and the radio frequency output end 15. Therefore, the radio frequency selection network component 2 and the metal shell 1 are matched to form a resonant cavity to form an ultra-wideband frequency selection network with a DC-12GHz bandwidth.
As shown in fig. 4, the basic operating band, bandwidth and rf performance of the ultra-wideband frequency-selective network formed by the rf frequency-selective network component 2 and the metal housing 1 are mainly determined by the distribution parameters of the input rf strip line 22 and the output rf strip line 24 in the metal cavity 13 and the rf coupling module 23. The radio frequency characteristic parameters of the ultra-wideband frequency-selective network are not changed by a device which loads a signal transmission line input to a radio frequency end and a signal transmission line of a radio frequency output end 15 to the ground, and the ultra-wideband frequency-selective network is very suitable for an open-circuit device which is connected with the ground in parallel and pulled down. The radio frequency performance parameters of the ultra-wideband frequency selection network can reach the working frequency bandwidth (BW is more than or equal to 2 GHz), the standing wave coefficient (VSWR is less than or equal to 1.5: 1) and the loss is small (less than or equal to 0.5 dB).
Further, as shown in fig. 4, a bottom copper foil layer is laid on the side of the substrate 21 facing the lower cavity. Discrete suppression device 3 is detachably connected to the bottom copper foil layer on the side of substrate 21 facing the lower cavity. The input radio frequency strip line 22 and the output radio frequency strip line 24 are provided with metal via holes penetrating through the substrate 21, one end of the discrete suppressor 3 is connected and installed on the substrate 21 through the metal via holes, and the other end is connected on the bottom wall of the lower cavity to form a strong transient electromagnetic pulse suppression passage. In other embodiments, the strong transient electromagnetic pulse suppression path may be formed by installing the discrete suppression device 3 by opening only the input rf strip line 22 or only the output rf strip line 24 with a metal via penetrating the substrate 21.
As shown in fig. 4, the discrete suppression device 3 may be one or more of a gas discharge tube, a transient voltage suppression diode, a semiconductor PIN diode. The gas discharge tube can be used for absorbing discharging slow-edge strong electromagnetic pulses such as lightning electromagnetic pulses (LEMP), the transient voltage suppression diode can be used for absorbing discharging slow-edge strong electromagnetic pulses such as lightning electromagnetic pulses (LEMP) and fast-edge strong transient electromagnetic pulses such as nuclear electromagnetic pulses (NEMP), and the semiconductor PIN diode can be used for absorbing discharging fast-edge strong transient electromagnetic pulses such as nuclear electromagnetic pulses (NEMP) and high-power microwave pulses (HPM). Therefore, when the discrete suppressor device 3 is a gas discharge tube and a transient voltage suppressor diode, it can be used to discharge a slow-edge strong transient electromagnetic pulse for absorbing and suppressing large energy. When the discrete suppressor device 3 is a semiconductor PIN diode, it can be used to discharge a fast-edge strong transient electromagnetic pulse with small and medium energy absorption suppression.
In summary, the protection device of the present application can provide strong electromagnetic pulse protection for ultra-wideband wireless radio frequency electronics, electrical equipment and facilities in extremely complex and harsh electromagnetic environments; the circuit is simplified, the cost is saved, and the requirements of engineering application practice are met.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A method for protecting a strong electromagnetic pulse of an ultra-wideband radio frequency link is characterized by comprising the following steps: the method comprises the following steps:
arranging a metal shell (1) with a metal inner cavity (13), wherein the metal shell (1) is provided with a radio frequency input end (14) and a radio frequency output end (15) which are communicated with the metal inner cavity (13);
an input radio frequency band wire (22), a radio frequency coupling module (23) and an output radio frequency band wire (24) which are connected between a radio frequency input end (14) and a radio frequency output end (15) are arranged in the metal inner cavity (13), and the input radio frequency band wire (22), the radio frequency coupling module (23) and the output radio frequency band wire (24) form a radio frequency selection network;
wherein, the input radio frequency strip line (22) and the output radio frequency strip line (24) are parallel to the inner wall of one side of the metal inner cavity (13); the input radio frequency band line (22) and the inner wall of the metal inner cavity (13) and the output radio frequency band line (24) and the inner wall of the metal inner cavity (13) form a grounding equivalent capacitor of a radio frequency selection network, and the input radio frequency band line (22) and the output radio frequency band line (24) form a series equivalent inductor of the radio frequency selection network.
2. A kind of ultra wide band radio frequency periodic line strong electromagnetic pulse protector, characterized by that: comprises a metal shell (1) and a radio frequency selection network component (2);
a metal inner cavity (13) is formed in the metal shell (1), and a radio frequency input end (14) and a radio frequency output end (15) which are communicated with the metal inner cavity (13) are arranged on the metal shell (1);
the radio frequency selection network component (2) is arranged in the metal inner cavity (13) and comprises an input radio frequency band wire (22), a radio frequency coupling module (23) and an output radio frequency band wire (24) which are connected between a radio frequency input end (14) and a radio frequency output end (15); the input radio frequency strip line (22) and the output radio frequency strip line (24) are parallel to the inner wall of one side of the metal inner cavity (13);
the input radio frequency band line (22) and the inner wall of the metal inner cavity (13) and the output radio frequency band line (24) and the inner wall of the metal inner cavity (13) form a grounding equivalent capacitor of a radio frequency selection network, and the input radio frequency band line (22) and the output radio frequency band line (24) form a series equivalent inductor of the radio frequency selection network.
3. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 2, characterized in that: the input radio frequency strip line (22) comprises an input radio frequency inductance part (221) arranged in the middle and input radio frequency capacitance parts (222) arranged at two ends; the output radio frequency strip line (24) comprises an output radio frequency inductance part (241) arranged in the middle and output radio frequency capacitance parts (242) arranged at two ends; the grounding equivalent capacitor is formed by a space between an input radio frequency capacitor part (222) and the inner wall of the metal inner cavity (13) and a space between an output radio frequency capacitor part (242) and the inner wall of the metal inner cavity (13), and the series equivalent inductor is formed by an input radio frequency inductor part (221) and an output radio frequency inductor part (241).
4. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 2, characterized in that: the radio frequency network component also comprises a substrate (21), wherein the substrate (21) is parallel to the inner wall of one side of the metal inner cavity (13) and divides the metal inner cavity (13) into an upper cavity and a lower cavity; the input radio frequency band line (22), the radio frequency coupling module (23) and the output radio frequency band line (24) are fixed on one side of the substrate (21) facing the upper cavity.
5. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 4, wherein: the input radio frequency strip line (22) and the output radio frequency strip line (24) are copper foils fixed on the substrate (21), the input radio frequency strip line (22) and the output radio frequency strip line (24) are arranged on the same straight line, and a space is arranged between the input radio frequency strip line (22) and the output radio frequency strip line (24).
6. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 4, wherein: the ultra-wideband radio frequency link strong electromagnetic pulse protection device further comprises a discrete suppression device (3), the discrete suppression device (3) is arranged in the lower cavity, one end of the discrete suppression device (3) is connected to the substrate (21), and the other end of the discrete suppression device is connected to the metal shell (1).
7. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 6, wherein: and the input radio frequency strip line (22) and/or the output radio frequency strip line (24) are/is provided with metal through holes for electrically connecting the discrete suppression devices (3).
8. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 6, wherein: one side of the substrate (21) facing the lower cavity is provided with a bottom copper foil layer.
9. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 6, wherein: the discrete suppression device (3) is one or more of a gas discharge tube, a transient voltage suppression diode and a semiconductor PIN diode.
10. The ultra-wideband radio frequency link strong electromagnetic pulse protection device according to claim 2, characterized in that: the metal shell (1) comprises a metal body (11) and a metal cover plate (12), the metal cover plate (12) is detachably connected to the metal body (11), a waterproof groove is formed in the outer wall, facing to one side of the metal cover plate (12), of the metal body (11), and a waterproof conductive rubber ring (16) is arranged in the waterproof groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170108.5A CN112994715B (en) | 2021-02-03 | 2021-02-03 | Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170108.5A CN112994715B (en) | 2021-02-03 | 2021-02-03 | Ultra-wideband radio frequency link strong electromagnetic pulse protection method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114824704A (en) * | 2022-04-12 | 2022-07-29 | 电子科技大学 | Electromagnetic protection assembly based on substrate integrated waveguide |
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